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Application of mineralogy in the interpretation of laboratory scale acid rock drainage (ARD) prediction tests : a gold case study
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Centre for Bioprocess Engineering Research
2015
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| _version_ | 1867614378377871360 |
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| access_status_str | Open Access |
| author | Dyantyi, Noluntu |
| author2 | Becker, Megan |
| author_browse | Becker, Megan Dyantyi, Noluntu |
| author_facet | Becker, Megan Dyantyi, Noluntu |
| author_sort | Dyantyi, Noluntu |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/13377 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:51:05.610Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| publisher | Centre for Bioprocess Engineering Research |
| publisherStr | Centre for Bioprocess Engineering Research |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/13377 Application of mineralogy in the interpretation of laboratory scale acid rock drainage (ARD) prediction tests : a gold case study Dyantyi, Noluntu Becker, Megan Broadhurst, Jennifer Lee Bioprocess Engineering Includes bibliographical references. The mining and beneficiation of gold generates large tonnages of waste, with up to 99% of mined gold ore discharged as waste. The waste generated contains unoxidized sulfides that when exposed to air and water react to form acid, which results in acid rock drainage (ARD). ARD is usually associated with low pH, high sulfate content and elevated concentrations of toxic elements. The mobility of ARD affects our scarce water resources, land and aquatic species. Methods applied to treat ARD do not provide a walk-away solution and they are either expensive or difficult to maintain. The best solution to completely eradicate ARD is to prevent it from the source. However, the effectiveness of ARD prevention depends on the accuracy of predicting future drainage quality. This can be done by using ARD prediction tests, which are generally classified as either static (acid base accounting, ABA, net acid generation, NAG) or kinetic (column leach, humidity cell, biokinetic test). There is no single test capable enough to accurately predict acid generating potential. It is therefore usual practise to conduct more than one test and cross-check results to ensure that the appropriate conclusions are made. In doing so, the reliability of the tests is improved but in some cases the different test results do not correlate. Mineralogy is an analytical technique that can be used to understand the nature of the errors and to better understand the leaching behaviour of minerals in the different tests. This study uses mineralogy to analyse both static and biokinetic test results of a Witwatersrand gold sample in order to improve the understanding of behaviour of mine wastes under different ARD prediction test conditions. A run-of-mine gold sample from the Witwatersrand region in South Africa was used as a case study to explore the mineral leaching behaviour for different ARD prediction tests. 2015-07-03T10:34:20Z 2015-07-03T10:34:20Z 2014 Master Thesis Masters MSc (Eng) http://hdl.handle.net/11427/13377 eng application/pdf Centre for Bioprocess Engineering Research Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Bioprocess Engineering Dyantyi, Noluntu Application of mineralogy in the interpretation of laboratory scale acid rock drainage (ARD) prediction tests : a gold case study |
| thesis_degree_str | Master's |
| title | Application of mineralogy in the interpretation of laboratory scale acid rock drainage (ARD) prediction tests : a gold case study |
| title_full | Application of mineralogy in the interpretation of laboratory scale acid rock drainage (ARD) prediction tests : a gold case study |
| title_fullStr | Application of mineralogy in the interpretation of laboratory scale acid rock drainage (ARD) prediction tests : a gold case study |
| title_full_unstemmed | Application of mineralogy in the interpretation of laboratory scale acid rock drainage (ARD) prediction tests : a gold case study |
| title_short | Application of mineralogy in the interpretation of laboratory scale acid rock drainage (ARD) prediction tests : a gold case study |
| title_sort | application of mineralogy in the interpretation of laboratory scale acid rock drainage ard prediction tests a gold case study |
| topic | Bioprocess Engineering |
| url | http://hdl.handle.net/11427/13377 |
| work_keys_str_mv | AT dyantyinoluntu applicationofmineralogyintheinterpretationoflaboratoryscaleacidrockdrainageardpredictiontestsagoldcasestudy |